This brief summarizes and examines the implications of recent Section 1115 Medicaid waiver activity. Section 1115 waivers provide states flexibility to test new approaches in Medicaid that differ from federal program rules and can have significant impacts for beneficiaries, providers, and states. While recent waivers and waiver proposals vary in their specific goals and approaches, some key themes are emerging, including using Section 1115 waiver authority to get a jump start on the 2014 Medicaid expansion and to restructure delivery and payment systems, particularly for high-need individuals.